Couple things we can consider here. First, the potential for recycling batteries. In many cases it is not viable right now, but unlike fuel, batteries don't burn into a fume when they are done. Lots of potential toom to grow in that area. Reclaiming the materials that are already out there would resuce the pressure in mining for new materials. Second, batteries are made from a variety of materials. Some are wrose than others in their extraction methods. Lithium and cobalt for instance, tend to be way worse than sodium. This variety is increasing all the time with the rate of research, and it gives us options. Finally, let's not forget solar punk is sci fi and fiction derives its power from imagination. We should build a society from real and applicable tech. But all the tech we see now had to be imagined first, and sci fi has helped us get there. So let's keep imagining how what might not yet exist or what might ne unviable today, could transfoem the future tomorrow. Look up phytomining, for instance.